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Allium dictuon : ウィキペディア英語版 | Allium dictuon
''Allium dictuon'' is a species of wild onion known by the common name Blue Mountain onion. It is native to a small section of the Blue Mountains straddling the border between southeastern Washington and norhteastern Oregon in the United States. It grows in Columbia, Garfield and Walla Walla Counties in Washington, plus Umatilla and Wallowa Counties in Oregon.〔(''Allium dictuon''. Flora of North America v 26 p 261. )〕〔(BONAP (Biota of North America Program) floristic synthesis, ''Allium dictuon'' )〕 ''Allium dictuon'' grows from bulbs connected by rhizomes. It produces two or three leaves each up to 28 centimeters in length. The scape is 20 to 40 centimeters tall and bears an umbel of up to 25 flowers. The bell-shaped flowers are bright pink or purplish and each is 1.1 to 1.6 centimeters long. Blooming occurs in June and July.〔〔(St. John, Harold. 1937. Proceedings of the Biological Society of Washington 50(2): 3–4, f. 1. )〕〔Hitchcock, C. H., A.J. Cronquist, F. M. Ownbey & J. W. Thompson. 1969. Vascular Cryptogams, Gymnosperms, and Monocotyledons. 1: 1–914. In C. L. Hitchcock, Vascular Plants of the Pacific Northwest. University of Washington Press, Seattle.〕 ''Allium dictuon'' grows in dry, open, rocky habitat.〔(''Allium dictuon''. ) Washington Burke Museum.〕 The vegetation in the area is dominated by bluebunch wheatgrass (''Pseudoroegneria spicata'' ssp. ''spicata'').〔(''Allium dictuon''. ) The Nature Conservancy.〕 The total population has been estimated to be between 200 and 500 individuals.〔 ==References==
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